Track for endless-track vehicles



` 6.1. HACKHAM TRACK FOR ENDLESS TRACK VEHICLES.

APPLICATION FILED AUG. I6, 1922.

IPaftnted Non 79 E923,...

2 SHEETS- SHEET I.

www fr G. J. HAGKHAPJI.

TRACK FOR ENDLESS WAN( VHHCLES.

APPLICATION HLED AUG. IG, 19221 a head at one end and two threaded portions o and (5 at the other ein. One of these is a right hand thread 'and one a left hand thread` and the).Y are engaged by siinilai-ly threaded nuts 7 and 8 between which is a locking plate 9. Between the head 5 of the bolt and the inner surface ot' the 'adjant contracted end of the tube is a washer 1() having a spherical surface.' rl`he bolt 4 hasv an opening 11 for the passage of lubricant and the Washer has a groove 12 and holes 13 fora similar purpose. `The holt also has a central opening 14 passing from one end to the other to permit thepassage of lubricant from one tube to the other. '.llhe enlargement 3 has a depression 15 into which tits a shoulder 1G on the'bolt f1, while the nut 'T tits tightly against the inner Smooth surface 1T of this enlargement.

Integral with the tubular links are por tions 18 Whichact as driving teeth anden gage the sprocket Wheels around which the endless track passes in the usual manner. Shoes 19 in the torni of (lished plates are fastened to the tubes by bolts 20.' These shoes have upturned end portions 21 and 22.

In the forni of the device shown in Figure 5 the spherical surface 2 of the tube 1 coacts with a spherical surface on a plugr fitted inside' the tube. The bolt 4 yhas a spherical head QtV integral therewith and passes through the plug 23 and has' on its end a screw thread 25 upon which screws a nut 26. The extreme end of the 'bolt is smooth as at QT and an eye SVtits over it, the eye heing formed on one end eta screw bolt Q9. A passage 30 extends through the bolt to permit lubricant to pass from one 'tube to the other.

Track Shoes 31 having upturned ends and 33 are fastened to plates 311- hy bolts rthese plates tit within openings in the tube and close the same. The screw threaded end o't' the bolt 29 'passes through the plate andks'lioe and `a nut 3G screws thereon to hold the parts in position.

Figure 6 shows the ott' center position of the opening in the cud of the tube, and Figure 7 shows a niodilication in which it is made oval.

ln the modification shown in Figure 8. tivo rows ot balls are in a` case 3T between the head 2i ot' the bolt and a washer 38 .inserted within the infturned end of the'tube.

A single nut :59 holds the bolt in place and the usual passage 30 extends through'the holt. i

ln the' forni shown in Figure 9, the track shoes 40 and plug -tl are cast' inone piece with the tube 1. Holes 42 are provided in f thc plug 41 and telt is interposed between the plug 41 and the Washer 10'.

has the usual passageway '30 therethrough and is held in place by a nut 39. l

The modification shown in Figure 10 has and platet in position through the nut 36 all as shown in said Figure 5. As in all 'other' `formsv the boit is'hollow and permits passage ot' lubricant from one. link to the other.

in` all of the forms it will be noted that each link can have free turning movement relative to the adjacent links, but the con'- tacting splieri'calsurfacesare held in engagernent by the boltsso that theflubricant cannot escape. Free passage iot the lubricantptroin one tube to another is provided for. 1n the form shown in Figure 1, the opening in the tubethrough which the Abolts areinserted isclosed by the track shoe itself, while in the forni shown in Figure 5, the track shoe is carried by a plate Ywhich tits Within the said opening and closes it.. In both cases any escape of the lubricant is!` prevented. i

This application is a division of my application Serial'No. 568,223, filed June 14, '1922.

Minor' changes can be inade Without departing from the spirit of the invention which is to be regarded vas limited only by the scope of the appended claims.

l claim as my invention: 1. Tracks for endless track vehicles com- -prisi'ng tubular links each having an external spherical surface at one end and an Iinspherical surfaces' in close contact, said nie'ans permitting the passage ot lubricant troni one tubular link to the other.-

El. 'lracks'foi' endless track vehicles cornprising tubular links having coacting spheri cal surfaces at their adjacent ends. and a bolt lconnectingthe tubulailinks and holding the spherical surfaces in close contact. said bolt being hollow tor-the passage o t'lubricant 'troni'one link to the other.

'4. Tracks 'for' endless track vehicles coniv prising tuluilarlinks having coacting 'spherh cal surfaces at their adjacentv ends. a bolt connecting the tubular .links and holding the spherical surfaces vin closecontaot, and a cant from one link to the other.

Tracks t'or endless track vehicles coniprising tubular links having coat-ting spl1eri' cal surfaces at their adjacent ends. a holt connecting the tubular links .ind holding the spherical surfaces in close contact. and a hemispherical metal washer on said bolt,said bolt being hollow for the passage of lubricant from one lilikl to the other and saidv washer having passage 'ays forlnbricant.

6. Tracks t'or endless track vehicles comprising 'tubular links each having an external spherical surface at one end and an in ternal spherical surface at the other end. bolts connecting the links and'hemispherical metal washers on said bolts. said bolts being hollow for the passage of lubricant from one link to theother.

T. Tracks t'or endless track vehicles comprising tubular links each having an external spherical surface at one end and an internal spherical snrtace at the other end. bolts connecting the links. and hemispherical metal washers on said bolts. said bolts being hollow for the passage oi lubricant. from one link to the othe and said washershaving passageways t'or lubricant.

H. Tracks for endless trackvehicles comprising tubular links each having an external spherical surface at one end and an internal spherical surface at the other end. a bolt connecting cach two adjacent links and being hollow t'or the passage of lubricant, shoes each comprising a plate with upwardlyv turned ends and means tor connecting the shoes to the links.

t). 'lracks vt'or endless track vehicles comprising tubular links each having an external spherical surt'ace at one end and au internal spherical surface at the other end. a bolt connecting each two adjacent links and being hollow t'or the j'iassage of lubricant. a

hemispherical washer on said bolt. shoes each comprisingr a plate with upwardly turned ends and means for connecting the shoes to the links.

lll. Tracks for endless track vehicles comprising tubular links cach havingr an external spherical surface at one end and an internal spherical surface at the other end. a bolt connecting each two adjacent links and being hollow for the passage ot' lubricant. a hemisphcrical washer on the bolt. shoes each so t'ormed as to limit the downward movement ot the links. and means for connecting the shoes to the links.

ll. Tracks t'or endless track vehicles comprising tubular links having coacting` spherical surfaces. a bolt connecting' each two adjacent links and beinghollow t'or the passage ot' lubricant. a hemisplnrical washer on said bolt. shoes. and means tor connecting the shoes to the links.

l2. l`racks tor endless tack vehicles comprising tubular linkshaving coacting spherical `surfaces. a"bolt connecting each two adA jacent links and holding the spherical survfaces in close contact. shoes each comprising a plate with upwardly turned ends, means for connecting the shoes to the Links. and driving teeth made integral with the link, said bolt being hollow for the passage of lu bricant.

12%. Tracks l'or endless track vehicles corn prising tubular links having coat-ting spherical surfaces. a bolt connecting each two adi jacent links and holding the 'spherical surfaces in close contact. a hemispherieal washer on lsaid bolt. shoes each comprising a plate with upwardly turned ends. means tor connecting the shoes to the links. and driving teeth made integral with "the link. said boltbcing hollow l'or the passage ot' lubricant ln testimony whereof, I have hereunto subscribed my name.

GEORGE JOHN Riifll'l'rtlil. 

